Track-sheave



H. SCHAAKE.

T RACK-SHEAVE. APPLICATION FILED AUG-4,1920.

Patented Mar. 8, 1921. I

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UNlTED STATES lATENT ()FFICE.

HENRY SCHAAKE, G31 VANCOUVER, BRITISH COLUMBIA, CANADA.

TRACK-SHEAVE.

Application filed August 4,

To all '10 7mm it may concern:

Be it known that l, HENRY SCLAAKE, citizen of the Dominion of Canada, reside ing at Vancouver, in the Province of British Columbia. C nada, have invented certain new and useiul improvements in Track- Sheaves, of which the following is a specification.

This invention relates to a track roller, such as is used for supporting the reciproeating carriage of a shingle cutting machine.

The gummy nature of the fine sawdust 1n shingle-cutting prevents the satisfactory application of a lubricant to slidable bearing for a shingle block carriage and renders the use of roller wheels desirable.

To insure unifo n thickness of the cut shingles it is necessary that lateral movement of the carriage should be prevented. With this object in view the carriage is frequently mounted on V grooved roller wheels to run on a correspondingly ll-shaped track. In such instance the roller wheels will maiir tain the alinement when new, but as the end faces of the hubs of the wl eels wear, the carriage will be allowed a corresponding lat eral deviation from a straight path.

To avoid the consequence of the wear of the end faces of the roller wheels I divide them in the plane of the V groove and afford them facility for moving apart as the wheel hubs wear by mounting the two halves of the wheel on a sleeve which is itself rotatably mounted on the axle pin of the sheave.

The invention is particularly described in the following specification, reference being made to the drawings by which it is accompanied in which:

Figure 1 is a side elevation of the grooved roller on the track, being a section on the line 1-1 in Fig. 2.

Fig. 2 is a vertical section on the line 22 in Fig. 1.

In these drawings 2 represents a portion of the square track rail which is suitably supported and secured to the stationary frame 10 of the machine with one of its diagonals in a vertical plane, and 3 represents a portion of the shingle block carriage which moves endwise along the track rail 2.

The V grooved roller wheels by which the carriage 3 is supported on the track rail 2 are made in two halves 4, divided in the Specification of Letters Patent.

Patented Mar. 8, 1921.

1920. Serial No. 401,248.

plane of the angle of the V groove, that is, in that of the vertical diagonal of the track rail.

The two parts l: are mounted to move freely on a sleeve 8 which is itself mounted to rotate on a pin secured by a set screw or otherwise in a bracket 6 which is integral with or secured to the carriage 3.

With this arrangement the two halves 4 of the wheel are free to move apart on the stove 8 to take up any wear of the end faces 7 of the wheel hub and preserve the straight line movement, and that sleeve is free to rotate on the axle pin 5.

is it is desirable that the two halves 4 of the wheel should move together as one a ing pin 9 is secured in the face of one half and projects t rough an aperture in the other half, which aperture is slightly larger to insure perfect freedom of endwise movement.

P ovision is made through the center of the pin 5 for lubricating the bearing of that sleeve on the pin and toward each end of the sleeve oil holes are drilled by which the bearings of the wheel halves 4 are lubricated.

It will be noted that the interposition of the sl eve 8 between the axle pin 5 and the bearings of the wheel halves at is necessary as without it the wheel halves have a clutching action on the pin which interferes with their fr e rotation, whereas with the sleeve, the clutching tendency is exerted on the sleeve which is itself free to rotate on the pin.

As the end faces 7 of the hubs of wheelhalves l wear, that wear will be automatically taken up by the action of the rail in the V groove between the two halves, and will not effect the true alinement of the carriage movement.

Having now particularly described my invention, I hereby declare that what I claim as new and desire to be protected in by Letters Patent, is:

l. A track sheave having a V groove to run on a correspondingly shaped track rail, means for automatically taking up the wear of the end faces of the hubs of the sheave without interfering with the free rotation of the sheave.

2. A grooved sheave in two parts divided in the plane of the bottom of the groove, a

sleeve on which the two halves of the sheave are mounted to move endwise, and an axle pin secured in the carriage on which pin the sleeve is rotatable.

3. A V grooved track sheave medially divided in the plane of the bottom of the groove, a sleeve on which the two halves of the sheave are mounted to move endwise, an axle pin secured in the frame of the machine on which the sleeve is rotatably mounted, and means enabling the two halves of the sheave to rotate together without interfering with theirfreedom to move apart.

at. A V grooved track sheave medially divided in the plane of the bottom of the groove, a sleeve on which the two halves of the sheave are mounted to move endwise, an axle pin secured in the frame of the machine on which the sleeve is rotatably mounted, and a driving pin secured in one half of the sheave and freely fitting an aperture in the other half,

A grooved sheave in two parts divided in the plane of the bottom of the groove, a sleeve on which the two halves of the sheave are mounted to move endwise, an axle pin secured in the carriage on which pin the sleeve is rotatable, and means for lubricating the inner and outer sides of the sleeve from the axle pin.

6. A track sheave comprising a frame having opposing bearing walls, an axle pin secured in the frame and projecting between said bearing walls, a sleeve journaled on said pin between said bearing walls, a track sheave proper comprising two half members having bearing hubs mounted on said sleeve and susceptible of movement toward and from one another on said sleeve, the outer ends of said bearing hubs adapted to engage the bearing surfaces of said frame and be maintained in contact with the same by the pressure of the track rail.

7. A track sheave comprising a frame having opposing bearing walls, an axle pin secured in the frame and projecting between said bearingwalls, a sleeve journaled on said pin between said bearing walls, a track sheave proper comprising two half members having bearing hubs mounted on said sleeve and susceptible of movement toward and from one another on said sleeve, the outer ends of said bearing hubs adapted to engage the bearing surfaces of said frame and be maintained in contact with the same by the pressure of the track rail, said sleeve being free to rotate on said axle pin and said half sheave members being free to rotate on said sleeve, substantially as shown and described.

- In testimony whereof I aflix my signature.

HENRY SCHAAKE. 

